I have some weird Issues with my 417 gearbox: It is upgraded with SHS HighTorque, SHS 13:1 gears, lonex black piston and Pom head, Sorbo and Guarder 130 spring. Gatee mosfet with break and 11.1 lipo.
But every time I fire it in Semi it locks up at with the piston locked to the back? If I remove the motor jumps back into resting postion.
I might have overlooked something so please help:)

The frame was already in a very bade shape, 4-5 different layers of spray, bad stippling ect. The slide was badly polished by previous owner and was scratched and crappy. A bit of fire/wood/paint/ a old fork later... A bit of fun and a new twist on the plain tacticool glock.